smith



APPLICATION FILED DEC. 2?, I915.

Patented Aug. 29, 1916.

2 SHEETS-SHEET l.

mw ilo W. A. SWHTH.

ROCK DRILLING APPARATUS.

APPLICATION FILED 02c. 21, 1915.

1 a 1 9 6 1 O Patented Aug. 29, 191%.

2SHEETSSHEET 2.

WILLIAM A. SMITH, OF DENVER, COLORADO, ASSIGNOR TO THE DENVER I tOCKDRILL MANUFACTURING COMPANY, DENVER, COLORADO, A CORPORATION OF DELA-WARE.

ROCK-DRILLING APPARATUS.

Specificatloers Patent. Patented Aug. 29, 1916.

Application filed December 27, 1915. Serial No. 68,794.

. a citizen of the United States, residing-at Denver, in the county ofDenver and State of Colorado, have invented new and useful Improvementsin Rock-Drilling Apparatus, of which the following is a specification.

The present invention relates to rock drilling apparatus, and moreparticularly the means for turning the same.

One of the primary objects is to provide a simple and yet veryefi'ective mechanism that will secure an automatic rotation of the drillbit.

A further object is to provide a device of this kind that is in the formof an attachment applicable especially to the type of drilling apparatusin which the feed is secured by fluid under pressure.

One embodiment of the invention is illustrated in the accompanyingdrawings, wherein Figure 1 is a side elevation of drilling apparatusequipped with the presentinve'ntion. Fig. 2 is a horizontal sectionalview on an enlarged scale through the turning means. Figs. 3, 4 and 5are sectional views taken respectively on the lines 33, 4-4 and 55 ofFig. 2, and Fig. 6 is a detail view partially in section through thecasing and gear carrying sleeve. 4

Similar reference numerals designate corresponding parts in all thefigures of the drawings.

In the embodiment illustrated, a motor of well known type, designatedgenerally by the reference numeral 10,!is employed. This motor ispreferably of the hammer type and operates on a drill bit 11 in a mannerwell understood. The motor is held in assembled condition by side bolts12, ,as will be understood by those skilled in the art. The said motorand drill bit are held in Working position by feeding means, consistingof a cylinder member 13 in which operates a piston having a portion 14projecting from the rear end of the cylinder, and pointed to provide aspur 15. The cylinder is secured to the motor by being attached to ahead block 16, and said head block, as is Well known, is held in placeby the side bolts 12. So far as described, this structure is well known.

The mechanism for turning the drill bit in the present embodiment,effects a partial rotation of the motor 10 and the cylinder 13, whichtogether form a unit, the two parts, as will be readily understood,being rigidly fixed together, andthe drill bit 11 being held againstrotation in the motor chuck 17. This mechanism includes a sleeve 18,which is slipped over the cylinder 13, and snugly receives the same,said sleeve having an outstanding flange 19 at its upper end, whichflange is provided with ears 20 through which the bolts 12 pass, saidbolts thus affixing the sleeve rigidly to the motor 10 and cylinder 13.Incidentally, it will thus be seen that the bolts constitute 'commonmeans for securing all these parts together: The said sleeve 18 isprovided between its ends with an external toothed gear 21, and saidgear is surrounded and inclosed by a casing, comprising two parts 22 and23 held together by bolts 24. The casing is thus held on the sleeve bythe gear, but can be removed by separating the said parts. The part 23includes a tubular transversely extending projection 24 having anenlargement 25 and terminating at its free end in ahandle grip 26.

The enlargement 25 constitutes a cylinder within which is mounted areciprocatory piston 27, the rod 28 of said piston operating in thetubular extension 24 and being coupled toa rack bar 29 that reciprocatesin said extension 24. The rack bar 29, as shown, is in mesh with thegear 21. It will thus be evident that if the handle 26 is held' againstturning and the piston 27 is reciprocated, this reciprocatory motionwill be transformed'by the rack 29 and gear 21 into an oscillatory'movement, and said oscilla-' tory movement will be imparted to thedrilling apparatus, and consequently to the bit hose line contains athrottle valve 35. From end portions ofthe valve chamber 31, ports 36lead to the ends of the cylinder 25 onstem, having spaced enlargements37 at both ends, and ports 38, formed longitudinally in the end portionsof the valve, which communicates with the central chamber of the valvecasing and with the end portions beyond the valve. lead from the endportions of the valve chamber 31, said exhaust ports being locatedrespectively between the two end enlargements 37 In addition, exhaustchannels 40 and 41 extend from the end portions of the valve chamber 31into the head 42 of the cylinder 27, and these ports are brought intocommunication with the space within the extension 24 by channels orcutaway portions 43 and 44 formed in the sides of the piston rod 38 atopposite end portions. thereof.

Briefly described, the operation of the mechanism is as follows: Whenthe drilling apparatus is in operative position and also in operation,if the fluid under pressure is admitted to the valve chamber 31 throughthe hose line 34, it will be noted that this fluid will pass through therear or outermost channels 36, and acting behind the piston, force saidpiston inwardly, the exhaust in advance of the piston taking placethrough the opposite channel 36 between the enlargements 37 of the valveand out through the adjacent exhaust 39. WVhen the piston 27 reaches theend of its stroke, the channel or cut-away portion 43 will communicatewith the port 41, thereby permitting the exhaust of the fluid from theinner end of the valve chamber 31, while the fluid will pass through theopposite channel 38 and against the opposite end of the valve 32,thereby shifting said valve. When so shifted, the ports will be thereverse of those shown, and the fluid will be admitted against theopposite side of the piston 27, and consequently reversing the movementof the piston. All that is therefore necessary is to hold the turningmechanism against movement by means of the handle 26, whereupon thedrilling apparatus will be bodily oscillated and the drill bit will begiven a corresponding movement.

It will be evident that this structure is exceedingly simple and that itmay be modi fied in various ways. It will also be observed that it canbe manufactured in the form of an attachment, which is applicable to adrill without the necessity of modifying the structure, inasmuch as itis only necessary to remove the nuts of the side b0lts 12, slip thesleeve and casing over the cylinder 13 until the cars 20' are upon theExhaust ports 39 also ends of the bolts 12, and then replace the nuts onsaid bolts.

From the foregoing, it is' thought that the construction, operation andmany advantages of the herein described invention will be apparent tothose skilled in the art, without further description, and it will beunderstood that various changes in the size, shape, proportion and minordetails of construction may be resorted to without departing from thespirit or sacrificing any of the advantages of the invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. The combination with drilling apparatus, of a handle therefor, andmeans mounted on the handle for turning the drilling apparatus.

2. The combination with drilling apparatus, of means for bodily'turningthe same, and a handle for holding the turning means from moving withthe drilling apparatus.

3. The combination with drilling apparatus, of means for bodilyoscillating the same, and a handle connected to the oscillating meansfor manually holding it from turning with the drilling apparatus.

4. The combination with drilling apparatus, including a motor, of fluidoperated feeding means for the drilling apparatus, and automatic meansassociated with the 'feeding means and moving with the motor for turningthe latter.

5. The combination with drilling apparatus, including a motor, of fluidoperated feeding means for the drilling apparatus, including slidablytelescoping members, one of which is connected to the drilling motor,and power driven means mounted on said member and moving with the sameand the motor for bodily turning the latter.

6. The combination with drilling apparatus, including a motor, of fluidoperated feeding means for the apparatus, including slidably telescopingmembers, one of which is connected to the drilling motor, areciprocatory motor mounted on the member, and means operated by thereciprocatory motor for bodily oscillating the drilling motor.

7. The combination with a drilling motor, of fluid operated feedingmeans therefor,

including a cylinder and a piston operating in the cylinder, one of thelatter being connected to the motor and together with said motorconstituting a unit, and a turning motor mounted on the unit and movingtherewith for bodily turning the same.

.8. The combination with a drilling motor, of fluid operated feedingmeans therefor, including a cylinder and a piston ope-rating in thecylinder, one of the latter being connected. to the motor and togetherwith said motor constituting a unit, a turning motor mounted on the unitand moving therewith for bodily turning the same, and a handle formanually holding the motor against turning.

9. The combination with a drilling motor, of fluid operated feedingmeans, including a cylinder connected to the drilling motor, and apiston operating in the cylinder, a motor mounted on the cylinder andmovable therewith, and means for oscillating the cylinder and drillingmotor from said second motor.

10. The combination with a drilling motor, a feeding motor and a turningmotor, of common means for securing all three motors together.

1 1. The combination with a drilling motor, a feeding means therefor anda turning means for the drilling motor, of side bolts for the drillingmotor engaging the feeding means and turning means for se curing alltogether. I

12. The combination with a drilling motor and feeding means therefor, ofa gear fast to the motor, a casing surrounding the gear, and a motor inthe casing and having a gear element meshing with said gear.

13. The combination with a drilling motor and feeding means, of a sleevefixed to the drilling motor and having a gear, and a turning motorhaving a. gear element meshing with said gear.

14. The combination with a drilling motor, of telescoping feedingmembers therefor, one of Which is connected to the drilling motor, asleeve gear surrounding said member and also connected to the drillingmotor, and a turning motor having a connection with the gear.

15. The combination with a drilling motor, of telescoping feedingmembers therefor, a gear surrounding one of the feeding members andseparable therefrom, common bolts connecting one of the feeding membersand the gear to the drilling motor, and a turning motor engaged with thegear.

16. The combination with a drilling motor, of telescoping feedingmembers therefor, a gear surrounding one of the feeding members andfixed against movement with respect to the drilling motor, a casing surrounding the gear and in which the feeding member is rotatable, and amotor mounted on the casing and connected to the gear.

17. The combination with a drilling motor, of telescoping feedingmembers therefor, a sleeve surrounding one of the members and connectedto the motor, said sleeve having an external gear, a casing surroundingthe gear and having a projecting portion provided with a cylinder, and areciprocatory piston operating in the cylinder and having a rack in meshwiththe gear.

18. An attachment for the purpose set forth, comprising a gear and meansfor mounting the gear upon the exterior of drilling apparatus andattaching it thereto, a casing surrounding the gear and rotatable withrelation thereto, means for holding the casing against rotation with thedrilling apparatus, and a motor mounted on the casing.

19: An attachment for the purpose set forth, comprising a gear and meansfor attaching the gear to drilling apparatus, a casing surrounding thegear, a motor mounted on the casing, and a handle for manually holdingthe motor and casing against movement.

20. An attachment for the purpose set forth, comprising a sleeve havinga gear and means for engaging the side bolts of a drill, and a motorassociated with the gear;

21. An attachment for the purpose set forth, comprising a sleeve havinears for engagement with the side bolts 0 a motor, said sleeve alsohaving an external gear, a casing surrounding the gear in which saidgear is rotatably mounted, a handle projection extending from the casingand including a motor, and a gear connection between the motor and saidexternal gear.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

. WILLIAM A. SMITH. Witnesses:

JAMES R. ELMENooRF, Jnssm TURNER.

